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Finding the Fourth Proportional to 169,154.11, 253,029.94 and 128,868.28

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Solution

The fourth proportional to 169,154.11, 253,029.94 and 128,868.28 is: 192,768.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,154.11 : 253,029.94 = 128,868.28 : x
  2. Step 2: Convert to fraction form
    169,154.11/253,029.94 = 128,868.28/x
  3. Step 3: Cross multiply
    169,154.11x = 253,029.94 × 128,868.28
  4. Step 4: Simplify right side
    169,154.11x = 32,607,534,349.74
  5. Step 5: Solve for x
    x = 32,607,534,349.74/169,154.11
  6. Step 6: Final answer
    x = 192,768.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.